Furnace-door.



PATENTED FEB. 5, 1907.

A. W. DRAGOO. FURNACE DOOR.

APPLIOATION FILED JUNE 8,1906.

314mm l'oz W1 b1 eases MM/YW.

v allc'umzigl PATENT oFFIoE.

' AL A W. .DR-AGOO, OF MURDOOK,- ILLINOIS.

#uRNAcE-o'ooR.

Specification of Letters Patent. Application filed June 8, 1906. serial No- 320,863.

Patented Feb. 5, 1907. 1

To all whom it mag concern:

Be it known that I, ALVA W. DRAGOO, a citizen of the United States, residing at Murdock, in the county of Douglas and State of- 5 Illinois, have invented certain new and useful Improvements in Furnace-Doors, of.

which the following is a specification.

This invention relates to new and useful lmprovements 1n furnace-doors; and 1t contemplates a structure capable v of use with furnaces, tanks, manholes, &c. I

The primary-object of the present invention is to provide novel means for locking a door at any desired point upon its pivot.

A further object of the invention isto provide a novel handle by which the door is moved upon its pivot, and which handle con-. trols the-adjustable locking means above referred to as well as a sliding bolt fori'maintainingthe door in a closed position.

The detailed construction will appear in the course of the following description, in which reference is had to the accompanying drawings, forming a part-of this specification, like numerals designating like parts throughout the everal views, wherein Figur 1 is a front'elevation illustrating a I door constructed and applied inaccordance with myinvention. Flg. 2 is a central l0 ;[1 gitudinal section of thehandle and locking elements on the line 2 2 of Fig. 1. Fi 3 is a vlongitudinal section on the line 3 3 of ig, 1, illustrating the means for locking the door at any desired point in its pivotal movement; and Fig. 4 is a perspective view of a spring element forming a part, of the construction disclosed in Fig. 3. I

In the ractical embodiment of my invention the etter A designates the front of a stove, and B the stove-door. formed adjacent to it's lowermost corners With horizontal laterally-offset studs 1 and 2. The studs 1 and 2 form elements of a hinge connection for the do0r, and to this end are received in res ective socketed brackets 3 and 4, mounte upon the front of the stove.

The stud 2 is provided with a recess 5 longitudinally thereof, in which the enlarged -toothed end 7 of a spring 6 has movement.

'The'spring 6 isillustrated in Fig. 4 and is of substantial L shape, comprising a-horizon 'tal arm 8 and a vertical arm 9, from which the end-7, formed with the inclined face'7, is laterally offset. The arm Sis formed with a flattened apertured' end 10, b which the spring 6 as an entirety has rigi connection with relation to its The door B is with the inner surface of the door. Said arm 8 is formed adj acent to the end 10 with a flattened. portion 11, by which construction the arm possesses the property of resiliency point of rigid connection 10 with'the door.

Mounted upon the front of the stove is an offset keeper 12 for the reception ofa vertical sliding bolt 13, which has movement in the space between thedoor B and astrap 14 sehandle 17. The handle 17 is of approved form and terminates in a rearward extension in the bolt 13.

through which projects a rearyvardly-extending shank 21, carried by thebolt 13 and ternnnating in an eye 22, which surrounds and has positive connection with the spring 6 at a point approximately central of the arm 8, as. is shown in Fig. 4. Movement of said spring is restricted by a stop-pin 23, carried by the 'door'and disposed beneath the flattened portion 11.,

i In practical use it is assumed that the door is closed, asshown in Figs. 1 and 2. The bolt 13 is forced to the limit of its upward movement'within the keeper 12 by theengagement therewith ofthe extension 18 of the handle 17, which drops. on its pivot by gravity to its lowermost position. In such disposition of the bolt 13'and handle 17-the' toothedend 7 of the sprin 6 engages ,inany one of a series of properlyormed notches 7 located Within the inner circumference of the socket'in the bracket 4. When it is desired to open the door, the handle 17 is'raised.

This operation depresses the extension'18' and the bolt 13 until the latter is disengaged. from the keeper 12. Simultaneously with this movement the downward movement of.

the bolt 13 throughthe connecting-shank 21 depresses the spring 6, which yields under its own resiliency from its point 10 of rigid connection with the door. 'When the spring 6 is depressed in the manner described, the toothed end 7 thereof has downward movement in the'reces's 5 of the stud 2 un'til said toothed end is disengaged and out of the path of the notches 7 The door is then free tobe swung on the studs 1 and 2 as a fulcrum.-

and locks the door at any desired point in its pivotal movement.

While the elements herein shown and described are well adapted to serve the purposes set forth, it is obvious that various minor changes may be made in the proportions, shape, and arrangement of the several parts without departing from the spirit and scope of my invention as defined in the appended claims.

Having rully described my invention, I claim 1. The combination with a hinged door, of a handle pivotally mounted therein, a sliding bolt carried by said door and operated by said handle, one of the hinges of said door being formed with notches, a resilient member having'rigid' connection with said door and terminating in a toothed end, designed for engagement with said notches, and a positive connection between said bolt and said I resilient member whereby movement of the former is transmitted to the latter.

2. The combination with a hinged door, of

a handle pivotally mounted therein, a sliding bolt carried by said'door and operated by said handle, one of the hinges of said door being formed with notches, an L-shaped resilient member having rigid connection at one end to said door and terminating at its 0 posite end in a tooth formed with an inclmed face and designed for engagement with said notches, and a positive rigid connection between said bolt and said resilient member wltereby movement ofthe former is transmitted to the latter.

In testimony whereof I affix my signature in presence oftwo witnesses.

Witnesses:

J. P. KENT, A. J. VIsE.

ALVA w. DRAGOO. 

